Process for preparing 5-(2-chloro-4-trifluoromethylphenoxy)-2-ni

Details Process for preparing 5-(2-chloro-4-trifluoromethylphenoxy)-2-ni Process for preparing 5-(2-chloro-4-trifluoromethylphenoxy)-2-ni

1981-04-02

1982-01-26

Waltz, Thomas A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

260401, 71103, 544 92, 560 27, 564430, C07C10376, C07C10200

Patent

active

043130003

ABSTRACT:
The invention comprises the preparation of a compound of the following formula (I): ##STR1## wherein R.sup.1 is alkyl of 1 to 12 carbons, from the compound of the following formula (II): ##STR2## by the steps of coupling (II) with 3,4-dichlorobenzotrifluoride; reacting the --NH.sub.2 group with an XCOOR compound, X being a leaving group with R an organic moiety; oxidizing the --CH.sub.3 group to a --COOH group; cyclization to produce a heterocycle with loss --OR; opening the heterocycle with an alkanesulphonamide; and oxidizing the resultant --NH.sub.2 group to an NO.sub.2 to yield a compound of formula (I). Novel intermediates are also described. Compounds of formula (I) are useful as selective pre- and post-emergent herbicides.

REFERENCES:
patent: 3840597 (1974-10-01), Moore et al.
patent: 3856859 (1974-12-01), Moore et al.
CA 91:175034v (1979).
CA 90:151815d (1978).

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